/**
 * Copyright (c) 2016-2019 人人开源 All rights reserved.
 *
 * https://www.renren.io
 *
 * 版权所有，侵权必究！
 */

package io.bsly.modules.app.resolver;

import io.bsly.common.utils.Constant;
import io.bsly.modules.app.annotation.LoginUser;
import io.bsly.modules.app.entity.localEntity.UserEntity;
import io.bsly.modules.app.interceptor.AuthorizationInterceptor;
import io.bsly.modules.app.service.localmaster.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

/**
 * 有@LoginUser注解的方法参数，注入当前登录用户
 *
 * @author Mark sunlightcs@gmail.com
 */
@Component
public class LoginUserHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {
    @Autowired
    private UserService userService;

    @Override
        public boolean supportsParameter(MethodParameter parameter) {
            return parameter.getParameterType().isAssignableFrom(UserEntity.class) && parameter.hasParameterAnnotation(LoginUser.class);
        }

        @Override
        public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer container,
                NativeWebRequest request, WebDataBinderFactory factory) throws Exception {
            //获取用户ID
            Object object = request.getAttribute(Constant.USER_KEY, RequestAttributes.SCOPE_REQUEST);
            if(object == null){
                return null;
            }

            //获取用户信息
            UserEntity user = userService.getById((Long)object);

            return user;
    }
}
